Cardinal Gates Lock-n-Block Sliding Door Pet GateFinally, a pet safety gate for sliding glass doors! The Cardinal Gates Lock-n-Block is the only sliding glass door gate available on the market today! No more worries about your dog bolting through the screen door because this gate adds a layer of protection even while using the screen door. Ideal for pets, the Lock-n-Block Sliding Door Gate also provides a much-needed visual to help prevent dogs from running into the glass or screen door. Our Cardinal Gates Lock-n-Block Sliding Door Pet Gate securely clamps onto the functional panel of a sliding panel door. Helps reduce the risk of injury to your pet, as well as damage to your screen door. Gate swings open in both directions for easy entering and exiting. Enjoy the fresh air! Use gate & screen door simultaneously. Can also be used as a child gate. Fits all standard sliding doors 1" and 1.5" thick.